16457( 4) - 23-Apr-2021 16:14:15 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16457 Version: 4 Check-in Time: 23-Apr-2021 16:14:15 STScI Edit Number: 1 Title Atmospheric Characterisation of A Disintegrating Planet in the Hot Neptune Desert ------------------------------------------------------------------------------------ Type Cycle GO 28 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Billy Edwards University College London Y CoI: Mr. Quentin Changeat University College London N CoI: Ms. Lara Anisman University College London N CoI: Mr. Kai Hou Yip University College London N CoI: Prof. Giovanna Tinetti University College London (UCL) N CoI: Amelie Gressier LATMOS N CoI: Dr. Angelos Tsiaras University College London (UCL) N CoI: Dr. Ingo Peter Waldmann University College London (UCL) N ------------------------------------------------------------------------------------ Abstract We propose to use the G102 (0.8 - 1.1 microns) and G141 (1.1 - 1.65 microns) grisms of Hubble's Wide Field Camera 3 (WFC3) to study an ultra-hot Neptune. Given its size and orbital period, it is an intriguing target for atmospheric characterisation as it is unclear how the planet has managed to maintain its H/He envelope. These Hubble observations will have the capability to unveil the composition of this atmosphere, constraining the metallicity and thus providing insights into its formation history, as well as being able provide initial measurements of the mass loss for this planet via the helium triplet at 1.083 microns. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will acquire two transits, one utilising the G102 grism while the other shall use G141. The observations will be made in slitless spectroscopic mode and use spatial scans. We will take both forward and reverse scans with 9 sets of scans per orbit. In orbits two, three and four of each visit, we will take an additional forward scan to maximise the duty cycle. In orbit one, a direct image will be taken for calibration purposes. For both visits, our spatial scans shall have a rate of 0.18 arcseconds/second. We will use the SPARS10 sequence with 15 samples per integration. We will read out a subarray with a size of 256 pixels. Individual exposure times will be 103.1 sec, resulting in a scan across 18.6 arcsecs which is equivalent to 143 pixels per exposure. Such an observational strategy leave plenty of additional pixels for estimating the background flux. The first orbit will be discarded, which is a standard procedure adopted by all HST transiting exoplanet observations, as the data shows greater systematics due to the thermal settling of the telescope. The remaining orbits will provide good phase coverage during transit, and allow for sufficient time (2 HST orbits - one before transit, one after transit) to establish the baseline stellar flux necessary to accurately measure the transit depth. 16457( 4) - 23-Apr-2021 16:14:15 - [ 2] Note that we used TWICE the orbital period as a work around to schedule the observations due to a limitation of APT caused by the exoplanet's orbital period being less than 1 day. The true orbital period of the planet is half of that listed in this proposal for scheduling purposes. We also adjust the phase of the first exposure accordingly (see comment to Visit 01). ------------------------------------------------------------------------------------ 16457( 4) - 23-Apr-2021 16:14:15 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 CD-38-15670 STAR, EXTRA-SOLAR RA=23H54M40.5304S, J2000 V = 9.76 PLANET DEC=-37D37'41.61" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 0.020843303178745425 -0.06980099994962075 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 16457( 4) - 23-Apr-2021 16:14:15 - [ 4] Visit: 01 (G141 Transit) Visit Requirements: SCHED 50%; ORIENT 55D TO 85 D; ORIENT 235D TO 265 D; Period 1.58412748 D AND ZERO-PHASE HJD2458718.565116445 On Hold Comments: Additional Comments: The orbital period of the exoplanet is less than 1 day, which cause a problem for HST scheduling software in APT. It claims in the Visit Planner, "Phase windows are not calculated when the gap between schedulable intervals is less than 1 days (sic), assuming no scheduling restrictions for constrain Phase 0.806 / 0.814" but if that's really what the HST scheduling software will do (as opposed to the APT simulation of that), then we need to work around this. The simplest work around is to double the period so THAT is longer than 1 day. But if we double the period we have to adjust the phase constraint accordingly - make it 2x closer to unity. So instead of Period = 0.7920638416243817 d and phase = 0.806/0.814 we use 1.58412748 d and 0.903/0.907. We do this for both visits. So as to not reduce the number of available scheduling windows, we have offset the zero phase of visit 2 from visit 1 by 0.7920638416243817 d days so that visit 1 utilises scheduling opportunities 1, 3, 5... and visit 2 options 2, 4, 6 etc. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CD-38-15670 WFC3/IR MULTIAC GRISM256 F132N NSAMP=2, SAMP-SEQ=RAPID 1 DEF (0.556 POS TARG 0, 0; PHASE CUM S) 0.903 TO 0.907; SEQ 1-3 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 CD-38-15670 WFC3/IR MULTIAC GRISM256 G141 NSAMP=15, SAMP-SEQ=SPARS10 8 DEF POS TARG 0, -12; SPATIAL CUM (1650.058 SCAN 0.18, 90.0 Degrees, S) Round trip ------------------------------------------------------------------------------------------------------------------------------------ 3 CD-38-15670 WFC3/IR MULTIAC GRISM256 G141 NSAMP=15, SAMP-SEQ=SPARS10 1 DEF POS TARG 0, -12; SPATIAL CUM (103.129 SCAN 0.18, 90.0 Degrees, S) Forward ------------------------------------------------------------------------------------------------------------------------------------ 4 CD-38-15670 WFC3/IR MULTIAC GRISM256 G141 NSAMP=15, SAMP-SEQ=SPARS10 8 DEF POS TARG 0, -12; SPATIAL CUM (1650.058 SCAN 0.18, 90.0 Degrees, S) Round trip; SEQ 4-5 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 5 CD-38-15670 WFC3/IR MULTIAC GRISM256 G141 NSAMP=15, SAMP-SEQ=SPARS10 1 DEF POS TARG 0, -12; SPATIAL CUM (103.129 SCAN 0.18, 90.0 Degrees, S) Forward ------------------------------------------------------------------------------------------------------------------------------------ 6 CD-38-15670 WFC3/IR MULTIAC GRISM256 G141 NSAMP=15, SAMP-SEQ=SPARS10 8 DEF POS TARG 0, -12; SPATIAL CUM (1650.058 SCAN 0.18, 90.0 Degrees, S) Round trip; SEQ 6-7 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 7 CD-38-15670 WFC3/IR MULTIAC GRISM256 G141 NSAMP=15, SAMP-SEQ=SPARS10 1 DEF POS TARG 0, -12; SPATIAL CUM (103.129 SCAN 0.18, 90.0 Degrees, S) Forward ------------------------------------------------------------------------------------------------------------------------------------ 16457( 4) - 23-Apr-2021 16:14:15 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 8 CD-38-15670 WFC3/IR MULTIAC GRISM256 G141 NSAMP=15, SAMP-SEQ=SPARS10 8 DEF POS TARG 0, -12; SPATIAL CUM (1650.058 SCAN 0.18, 90.0 Degrees, S) Round trip; SEQ 8-9 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 9 CD-38-15670 WFC3/IR MULTIAC GRISM256 G141 NSAMP=15, SAMP-SEQ=SPARS10 1 DEF POS TARG 0, -12; SPATIAL CUM (103.129 SCAN 0.18, 90.0 Degrees, S) Forward ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CD-38-15670 1 WFC3/IR MULTIAC GRISM256 F132N none none none none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM 16457( 4) - 23-Apr-2021 16:14:15 - [ 6] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G141 none none none none 1 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 2 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G141 none none none none 2 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 3 N/A CUM 16457( 4) - 23-Apr-2021 16:14:15 - [ 7] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 3 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G141 none none none none 3 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 4 N/A CUM 16457( 4) - 23-Apr-2021 16:14:15 - [ 8] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 4 N/A CUM CD-38-15670 9 WFC3/IR MULTIAC GRISM256 G141 none none none none 4 N/A CUM 16457( 4) - 23-Apr-2021 16:14:15 - [ 9] Visit: 02 (G102 Transit) Visit Requirements: SCHED 50%; ORIENT 55D TO 85 D; ORIENT 235D TO 265 D; Period 1.58412748 D AND ZERO-PHASE HJD2458719.357180287 On Hold Comments: Additional Comments: See comment to Visit 01 ! It applies equally to Visit 02. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CD-38-15670 WFC3/IR MULTIAC GRISM256 F132N NSAMP=2, SAMP-SEQ=RAPID 1 DEF (0.556 POS TARG 0, 0; PHASE CUM S) 0.903 TO 0.907; SEQ 1-2 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 CD-38-15670 WFC3/IR MULTIAC GRISM256 G102 NSAMP=15, SAMP-SEQ=SPARS10 9 DEF POS TARG 0, -12; SPATIAL CUM (1856.315 SCAN 0.18, 90.0 Degrees, S) Round trip ------------------------------------------------------------------------------------------------------------------------------------ 3 CD-38-15670 WFC3/IR MULTIAC GRISM256 G102 NSAMP=15, SAMP-SEQ=SPARS10 9 DEF POS TARG 0, -12; SPATIAL CUM (1856.315 SCAN 0.18, 90.0 Degrees, S) Round trip; SEQ 3-4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 4 CD-38-15670 WFC3/IR MULTIAC GRISM256 G102 NSAMP=15, SAMP-SEQ=SPARS10 1 DEF POS TARG 0, -12; SPATIAL CUM (103.129 SCAN 0.18, 90.0 Degrees, S) Forward ------------------------------------------------------------------------------------------------------------------------------------ 5 CD-38-15670 WFC3/IR MULTIAC GRISM256 G102 NSAMP=15, SAMP-SEQ=SPARS10 9 DEF POS TARG 0, -12; SPATIAL CUM (1856.315 SCAN 0.18, 90.0 Degrees, S) Round trip; SEQ 5-6 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 6 CD-38-15670 WFC3/IR MULTIAC GRISM256 G102 NSAMP=15, SAMP-SEQ=SPARS10 1 DEF POS TARG 0, -12; SPATIAL CUM (103.129 SCAN 0.18, 90.0 Degrees, S) Forward ------------------------------------------------------------------------------------------------------------------------------------ 7 CD-38-15670 WFC3/IR MULTIAC GRISM256 G102 NSAMP=15, SAMP-SEQ=SPARS10 9 DEF POS TARG 0, -12; SPATIAL CUM (1856.315 SCAN 0.18, 90.0 Degrees, S) Round trip; SEQ 7-8 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 8 CD-38-15670 WFC3/IR MULTIAC GRISM256 G102 NSAMP=15, SAMP-SEQ=SPARS10 1 DEF POS TARG 0, -12; SPATIAL CUM (103.129 SCAN 0.18, 90.0 Degrees, S) Forward ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 16457( 4) - 23-Apr-2021 16:14:15 - [ 10] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CD-38-15670 1 WFC3/IR MULTIAC GRISM256 F132N none none none none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 1 N/A CUM CD-38-15670 2 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 1 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 2 N/A CUM 16457( 4) - 23-Apr-2021 16:14:15 - [ 11] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 2 N/A CUM CD-38-15670 3 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 2 N/A CUM CD-38-15670 4 WFC3/IR MULTIAC GRISM256 G102 none none none none 2 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 3 N/A CUM 16457( 4) - 23-Apr-2021 16:14:15 - [ 12] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 3 N/A CUM CD-38-15670 5 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 3 N/A CUM CD-38-15670 6 WFC3/IR MULTIAC GRISM256 G102 none none none none 3 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 4 N/A CUM 16457( 4) - 23-Apr-2021 16:14:15 - [ 13] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 4 N/A CUM CD-38-15670 7 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 4 N/A CUM CD-38-15670 8 WFC3/IR MULTIAC GRISM256 G102 none none none none 4 N/A CUM 16457( 4) - 23-Apr-2021 16:14:15 - [ 14] Summary Form for Proposal 16457 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures GRISM256 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=15, NSAMP=2, SAMP-SEQ=RAPID, SAMP-SEQ=SPARS10 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 235D TO 265 D, ORIENT 55D TO 85 D, PHASE 0.903 TO 0.907, POS TARG 0, -12, POS TARG 0, 0, Period 1.58412748 D AND ZERO-PHASE HJD2458718.565116445, Period 1.58412748 D AND ZERO-PHASE HJD2458719.357180287, SCHED 50%, SEQ 1-2 NON-INT, SEQ 1-3 NON-INT, SEQ 3-4 NON-INT, SEQ 4-5 NON-INT, SEQ 5-6 NON-INT, SEQ 6-7 NON-INT, SEQ 7-8 NON-INT, SEQ 8-9 NON-INT, SPATIAL SCAN 0.18, 90.0 Degrees, Forward, SPATIAL SCAN 0.18, 90.0 Degrees, Round trip ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F132N, G102, G141 ------------------------------------------------------------------------------------------------------------------------------------ Target Names CD-38-15670 ------------------------------------------------------------------------------------------------------------------------------------